Features of the local environment of ions Mn2+ in ZnS crystals and nanocrystal ZnSxSe1-x:Mn and ZnxCd1-xS:Mn

Oleksandr Kovalenko; Mykhailo Bulanyi; Oleg Khmelenko; Віталій Славний

doi:10.15330/pcss.26.1.67-71

Authors

Kovalenko O.V. Oles Honchar Dnipro National University, Dnipro, Ukraine
Bulanyi M.F. Oles Honchar Dnipro National University, Dnipro, Ukraine
Khmelenko O.V. Oles Honchar Dnipro National University, Dnipro, Ukraine
Slavnyi V.V Oles Honchar Dnipro National University, Dnipro, Ukraine

DOI:

https://doi.org/10.15330/pcss.26.1.67-71

Keywords:

ZnSxSe1-x:Mn, ZnxCd1-xS:Mn, crystals, nanocrystals, self-propagating high-temperature synthesis, X-ray diffraction analysis, phases composition, crystal structure, EPR spectra

Abstract

ZnS_xSe_1-x:Mn and Zn_xCd_1-xS:Mn nanocrystals were obtained by the method of self-propagating high-temperature synthesis. The EPR spectra of Mn²⁺ ions in these nanocrystals and in crystals of the same compounds grown from the melt under inert gas pressure were studied. It has been found that the ultrafine structure constant of the EPR spectra of Mn²⁺ ions in both nanocrystals and crystals has a jump-like dependence: in ZnS_xSe_1-x:Mn compounds at a parameter value of x = 0.2; in Zn_xCd_1-xS:Mn compounds at x = 0.6-0.7. These changes correlate with changes in other physical properties of nanocrystals, namely, the values of microstrain stresses and dislocation density.

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